I think you are going about this the wrong way. You shouldn't be thinking "how can I invest this money?" you should first be thinking about how you can make money online in a sustainable way. Once you figure that out then you'll know how to best invest the money that you have.
I don't think creating your own product is a good way to start off. I think it's better to figure out how this whole world works as an
affiliate and then eventually create your own product if you want to go that route. You may have been mislead by an advertisement somewhere that says "Making money online is easy!" It's not that easy. You have a lot of trial & error and study ahead of you if you want to master it.
If you get into PPC you can easily blow all of your money without much return if you don't know what you are doing. PPC is a whole world all of it's own and it takes a lot of time and study to master it.